poet vs John Milton

poet and John Milton both are nouns.

Word	Noun	Adjective	Verb	Adverb
poet	Yes	No	No	No
John Milton	Yes	No	No	No

poet (noun)	John Milton (noun)
a writer of poems (the term is usually reserved for writers of good poetry)	English poet; remembered primarily as the author of an epic poem describing humanity's fall from grace (1608-1674)